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Evaluation of smectic biphenylcarboxylate ester liquid-crystalline polysiloxane stationary phases for capillary column gas chromatography

✍ Scribed by Markides, K. E. ;Chang, H-C. ;Schregenberger, C. M. ;Tarbet, B. J. ;Bradshaw, J. S. ;Lee, M. L.

Publisher: John Wiley and Sons
Year: 1985
Tongue: English
Weight: 366 KB
Volume: 8
Category: Article
ISSN: 0935-6304
DOI: 10.1002/jhrc.1240080906

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✦ Synopsis

Mesomorphic biphenylcarboxylate esters were coupled via flexible aliphatic hydrocarbon spacers to a polysiloxane backbone. The influence of spacer length, percent mesomorphic substitution, and crosslinking of the stationary phase on liquidcrystalline transition temperatures and on chromatographic performance was investigated. Unique selectivity and good efficiency over a wide temperature range for gum and crosslinked liquid-crystalline phases were demonstrated by the separation of various isomeric polycyclic aromatic compounds.

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